Air-pump.



D. H. PRUTTON.

AIR PUMP.

APPLICATION FILED man, 1918.

1,281,068; Patented Oct. 8, 1918.

45 INVENTOR WITNESSES n Wan/ 1 4 I I Y fldwMVV 'I I (W-yaw ATTORNEY Iii, WTQET, :5 CLEVELAND, GHIO.

AIR-PUMP.

Application filed enuery it,

, may concern: that L Emmi States, residing at of *Cuyzihoga and certain new site in Ale-Philips, of

{wing n specii cstion. his invention hos ieistion to on comhzis to to provide nsrticuini'iy for the compressor by e mover of the vehicie,

oi? the invention to gropi ssoir and operating mechaiding o commutator cap to 9 embodied in motor cars of the U11 iii? compressor proper mounta timer cop and on o'pemting the compresses designed fox the, shaft Within the Hill ier ohj'ect of We invention is in. compressor of the piston type operable by means of a and embodying a timer cap Minin connected to the compressor, and at V1 sch mechanism nfissocinted with the shaft icidirect connection to the timing shaft whereby the compressor nmy be actuated, the time? cup being shiftsbie in the usual manner to advance or i'c'tard the shock,

in smiition to the foregoing my invention comprehei'ids improvements in the details of construction mid arrangement of the parts to he hereinafter more iuiiy described and pzti'ticuisiriy set forth in the appended chums v I In the accompanying drawings in which similar and correspondingparts aie designated by the some characters of reference thyom hout the several views in which they :inncsi' 1, is s. View in front elevation of containing; the timing goal-s, end

the relation thereto of my air tuni n" can partly in section and nnrtiy Specification of Letters Patent.

he used in piece of the commu v ls a, View in vertical section, with Pei-tented Got. 8 1918.

Serial 1%. $312,286.

in cievation taken on the line 2-2 of the preceding figure, and

Fig. 3, is a. detail section 3-3 of Fig. 9

With reference to the drawings, 1-0 indi cei'tes the front plate of the casing containing the timing gears, the structure shown being that embodied in the Ford type of motor vehicle. The timer shaft, which extends centrally through the casing is indicated at 11, and in the present instance the forward 'cnd is pointed as at 12 to form a clutch surface for a purpose Which will he presently obvious.

Mounted upon the front plate of the casing containing the timing gears is the timing cap 18 adopted for rotation through 21 psi"- tisi revolution to advance and retard the spark. The timing mechsnisn'i including the comn'iutetor and timing esp are well known and hence a, detailed description thereof is not necessary for the comprehension of my invention.

taken on the line For the purposes of my invention, the

timer cap 13 is formed with a central opening 14:, and the outer surface of the cap is recessed as at 15 around said openin x The outer face oi the timer cap is fi'usto-conicei in configuration, and is formed With an unnuiai race-Way 16 terminating in e indiei annular things 17. The compressor consists of 2L circular casing 18 formed of on upper iziif l9, and a. iower had-1f 20, the same being separable and connected together by means of festenings 21 which penetrate apertures in the flange 22 formed on the meeting edges of said sections. The section 1 9 of the casing is formed with a cyiinder 28 having an "extension 24 at its outer end or head emh the sumo-being reduced and threaded as at 25 to receive e sieeve or valve casing 26. The iceduced end 25 is formed with s val-vs sent against which a spherical veive 27 hears, said Valve being held in piece by means of a coil spring 28 which engages the some and bears against a shoulder formed interim-1y of said" Valve casing. The head of the cylinder is eiso formed with opening 29 which is normeliy closed by means of a, flat misre- 30 provided into whereby to posmit' entrance 0:35 air into m-l'iiy of the cylinder the cylinder upon an intake stroke of the piston but to'close upon a working stroke. The valve 27 operates in a reverse manner.

A piston 31 operates in the cylinder and is provided upon its outer end with a reduced portion 32 against which a washer or gasket 33 of soft .material is placed having the periphery thereot bent around the reduced portion 82 ofthe piston, the packing being held in place by means of a washer 34 applied thereto and held in place by means of a screw 35 which penetrates said washer, the packing gasket and the piston. The under side of the piston is hollowed out, and a wrist pin 36 is passed transversely therethrough to which the outer end of a conuecting rod 87 is connected. The opposite end of the connecting rod is formed with an annular enlargement 38 forming an eccentric cap, formed in disconnectable sections to receive the eccentric disk 39 which is formed integrally with the shaft- 40. The shaft 40 passes transversely through the casing of the compressor and is assembled therein before the sections 19 and 20 of the casing are connected together. To prevent longitudinal movement of the shaft, collars, 41 are formed integrally upon the shaftto bear against the faces of the casing.

One end, viz: the outer end oi. the shaft 40 is formed with a longitudinally extending key-way -tZ,and said shaft 40 is formed with a longitudinally extending channel passing entirely therethrough to receive a rod 43 which extends theretzhrough. This rod 43 is provided with a key 44 which normally rests in and operates within the key-way 4-2 so as to lock the shaft 40 to the rod for rotation in unison, but to permit sliding movement of the rod 43 relative to the shaft in a longitudinal direction. Formed integrally upon the outer face of the casing 18 of the compressor and centrally thereof is an enlargement 45 having a. rectangular exterior. The shaft -t0 passes through said enlargement, and secured to the end of said enlargement is a spring finger 46 which normally bears against the rod 43. The outer end of the rod 43 is formed with an annular groove 47 in which the spring finger 46 becomes heated at times. To facilitate shifting of the rod 43, the outer end thereof is provided with a knob -18. The opposite or inner end of the shaft 40 extends into the recess 15 of the timer cap. and the adjacent end of the rod 43 passes beyond said end of the shaft 10 and is threaded for connection to the reduced end 49 of a receptive clutch member 50. Said clutch member 50 is in the nature of an annular block having its outer face formed with an annular recess, the same being lined as at M with material designed to afford firm frictional engagement with end 12 of the commutator shaft. The reduced end 49 of the receptive member snugly engages the opening 11- of the timer cap so as to be slidably and rot atably mounted therein and encircling the inner end of the shaft 40 is a coil spring 52 which bears at one end against the bottom of the recess 15, and at its opposite end against a washer 53, the washer in turn bearing against a pin Stwhieh passes through longitudinally extending slots 55 in the shaft 40. and through an opening in the rod 43 in which rod the pin is secured. The inner side of the compressor casing 18 is formed with an annular enlargement o having an annular recess 57 which is designed to receive the flange 17 of the timer cap, and is also formed with an inwardly directed annular flange 58 having an annular ball race-way 59 therein in which spherical bearing members (30 are placed to engage the race-way 16 of the timer cup. In this manner the timer cup is fixed to the compressor casing for rotation r'elativd thereto, to permit adjustment of the timer cap for the purposes of advancing or retarding the, spark. In order that the compressor casing may be "rigidly held againstrotation, I provide an arm indicated at? 61, having one end fixedly secured at 62 to the casing containing the timing gears, and its opposite end formed with an enlargement (13 having a squared aperture St in which to receive the rectangular enlargement 45 ot' the compressor casing.

Normally, the coil spring 53 within the recess of the timer cap urges the rod 43 outward and thereby retains the receptive member 50 of the clutch out of engagement with the timer shaft. The timer is thus permittcd to rotate without affecting the compressor whatsoever. However, when it is desired to start operation of the compressor it is but necessary to push upon the knob 48 so as to move the rod '13 longitudinally until the clutch member 50 is fixedly engaged against the commutator shaft 11. the clutch members being held in such engagement by the engagement of the spring finger 46 in the groove -17 of the rod. Rota tion of the commutator shaft is thentransmittcd to the receptive clutch member 5(L11b thence through the rod l3, and key -.tlto the shaft 10. Rotation oi said shaft 40 is converted into reciprocatory movement of the piston 31 by means of the eccentric connection thereby compressing the air within the cylinder which may be conveyed by means of a hose or other means attached to the valve casing 26 to the tire or other device] or machine to be supplied with air under pressure. Actuation of the compressor may be stopped by pulling upon the knob 18 so as to disconnect the clutch members.

While I have illustrated and described my invention with some degree of particularity, I realize that in practice various alterations -thereover may he made and I therefore de sire to reserve the ri ht and privilege of the details of conment of the correlative parts without dcparting from the spirit of the invention. or the scope of the appended claims.

Having. thus described my invention what I claim new and desire to secure by Let tors Patent is 1. In a motor vehicle, the combination with the timer shaft and timer cap, of an air compressor mounted upon said cap, and means for operatively connecting the working' parts of the compressor to the timer shaft.

2. In a motor vehicle, the combination with the timing shaft and timer cap, of a compressor rotatably mounted on the timer cap, and means for operatively connecting the compressorto the timer shaft.

3. In a motor vehicle, including the timer shaft and timer cap, of a compressor casing, means for rotatably connecting the timer cap to the compressor casing, a compressor mechanism within the casing, and means for operatively connecting said mechanism to the timer shaft. I

a. In a motor vehicle, the combination with the timing gear casing, the timer shaft, and timer cap rotatable relative to the casing, of a compressor casing rotatably mounted upon the timer cap, means connecting the compressor casingto the timer casing to prevent rotation of the compressor casing but to permit rotation of the timer cap, acompressor mechanism Within the compressor casing, and means for operatively connecting said compressor mechanism to the timer shaft. A

5. In a 'motor vehicle, the combination with the timing gear casing, the timer cap rotatable relative thereto, and the timer shaft, of a compressor casing, means for rotatablyconnecting the timer cap to the compressor casing, polygonal enlargement formed. on the compressor casing, an arm rigidly, connected at one end to the timing gear case and having a polygonal aperture at its other end to receive the polygonal enlargement of the compressor casing, compressor mechanism within the compressor casing, and means for speratively connecting said compressor to the timing shaft.

6. In a motor vehicle, the combination with the timing gear casing, the timing cap and commutator shaft, of an annular extension on said timer cap to form a ball-hearing race-Way, an annular radial flange terminating said extension, a compressor casing having an annular extension formed with an annular recess to receive the annular flange, and an annular race-Way for juxtaposition with the race-way of the timing cap, ballbearing members in said race-ways, means for rigidly connecting the compressor casing to the timer casing. coinpressor mechanism within the casing. and means for opcrativel-y connecting said mechanism to the commutator shaft.

7. In a motor vehicle. the combination with the timing cap and connnutator shaft;

of a conical terminal formed on said commutator shaft to form a clutch member, a coinpressor casing mounted on the timer cap, ('on'ipressor mechanism within the casing, a receptive clutch member for association with the end of the commutator shaft, means op-. eratively connecting said clutch member with the operating mechanism of the compressor, and means for moving the receptive member of the clutch into engagement with the commutator shaft, to transmit motion to the compressor mechanism.

8. An air compressor attachment for mo" for vehicles. including a timer cap, a com pressor casing, mounted thereon, a shaft mounted in the casing, a compressor mecha nism operable upon rotation of said shaft, and means for connecting said shaft to the commutator shaft of a motor vehicle to actuate the compressor mechanism.

9. An air compressor attachment for motor vehicles. including a timer cap, a compressor casing mounted thereon, a hollow shaft extending through the compressor casing and timer cap,,a compressor mechanism operable by rotation of said shaft, a rod slidaloly mounted in the shaft, means connecting the shaft to the rodfor rotation in unison but to permit sliding movement of the rod, and a clutch member on one end of the rodfor engagement against the commw tator shaft of the motor vehicle to transmit power to the compressor mechanism.

10. An air compressor attachment for motor vehicles including a timer cap, a compressor casing mounted thereon, a hollow shaft passing through. the casing and cap, compressor mechanism operable by rotation. of said shaft, a rod passing through the shaft and connected thereto for rotation, said rod being mounted the-rein for sliding movement, said shaft having longitudinally extending slots, a pin passing through said slots and fixedly secured to the rod, spring within the timer cap engaging the pin to retain the rod in one position, and a. clutch member secured to one end of the rod for engagement with the commutator shaft of the motor vehicle when the rod is moved said spring to transmit power to the shaft. 7 11. An air compressor attachment for mo for vehicles, including a timer cap having central opening and a recess formed around.

said opening, a compressor casing mounted L timing cap, a rod passing through the shaft for sliding movement, means connecting the shaft to the rod for rotation in unison, a pin rigidly fixed to the rod and having its terminals extending through the slots of the shaft, a washer surrounding the shaft and engaging the pin, a coil spring mounted within the recess of the timer cap to engage the washer to retain the rod in one position, a knob on one end of the rod to move the same against tension of the spring, a clutch member mounted upon the other end of the rod having a recess to receive the commutator shaft of the motor vehicle, a compressor mechanism operable by rotation of 15 the shaft, and means for releasably retaining the rod in an inward position.

In testimony whereof I aiiix my signature in presence of two witnesses.

DANIEL H. PRUTTON.

Witnesses Minions D. NICHOLS, LOUIS G. Veer.

Copies of this patent may be obtained for fiire cents each, by addressing the Commissioner of Patents, Washington, D. C. 

